Evaluating the long-term effects of cognitive behavioural therapy as an early intervention for at-risk anxiety disorders among preschool children in Asia

There are few evaluations of early intervention for the prevention of anxiety disorders in East Asia, and those that exist generally evaluate outcomes to a maximum of 6–12 months. The current study evaluated the long-term effect (5 years) of an anxiety prevention program presented to preschool children and their parents in Japan. Participants for the study were 10 inhibited children 5–6 years old and their parents. The parent’s and children’s program comprised group sessions of a cognitive-behavioural program. Parents and teachers completed the anxious/depressed, withdrawn and behavioural inhibition at pre-post-intervention and 3-month follow-up. Five years after starting the intervention, participants were invited to a diagnostic interview, Anxiety Disorders Interview Schedule (ADIS) to examine a long-term preventive effect of the intervention. The majority of children showed a reduction in anxious/depressed, behavioral inhibition, and approximately half showed reliable change according to parents' and teachers' reports. Moreover, the results indicated that 9 of the 10 children did not met the diagnostic criteria for anxiety disorders. These results suggested that the early intervention had preventive effects because the diagnostic criteria for anxiety disorders were not met in the follow-up assessment conducted five years later.